Phonograph



(No Model.)

T. A. EDISON.

PHONOGRAPH. No. 897,706. Patented Feb. 12, 1889.

ATTORN Yd.

(Case No. 808,)

Nl'TED @TATES Farmer Erica PHQNOG APE-i.

SPEUIFICATIQN forming part of Letters Patent No 397,706, dated. February '12, 1889.. Application filii October 11, 1888. Serial No. 287,844. (No model.)

To all whom it may concern.-

new and useful Improvement in Phonographs, of'u'hich the following is a speciflcation. l

The object of my inventionis to permit of the use upon the tapering" phonograni-cylincler of the phonograph of slightly-tapering or true eylimlrical phonograms, such as paper cylin ders covered with indenting'niaterial. I accomplish this by the use of a false shell having a substantially cylindricalsha-pe, but with aiapering bore adapted to fit upon the taper in'g phonograni-eylinder, and preferably with a slight taper uponits external surface toenahleitto receive a slig'litly-taperin c phonm grannhla-nk.

'My invention is lllusiraieil nying drawings.

Figure 1 a front clwatlon of a phonogram-cylimlc'r with a false shell and phonogram-hlank placed thereon according to my invention, and Fig. 2 is an elevation of the phonograin-cylinder and longitudinal section of the false shell and phonograni-blank.

A is the ordinary tapering lQX-Qillllg phonograzn cylinder of a phonograph, and ii indicates a portion of the shaft which carries it. i

l is'ilie false shell, which is preferably made of neial, and which has a iia 'icringhore, as shown, so that it is adapted to fit upon the tapering cylinder A. the false shell C is also tapered, bin to a less degree'than isiisinner surface.

D represents the phonogram-blank, having a slightly-tapered here, which may be a covcred paper cylinder, the method of making in the accon pa- The outer surface of which 'is described in my application No. 807, filed October 11, 1888, Serial No. 287,843.

It will be seen that the phonograni-blank D maybe readily placed and held upon the false shell C, and that the false shell can then he slipped upon the phonogram-cylinller A, and the phonogram-blank I) may then be used fol: recording or reproducing soni'nl. 'It willflhe seen also, that the use of the false shell makes it possible to employ with the same phonograph either the. considerably-fapered wax or other cylinders which have heretofore been commonly used or the slightly-tapered paper or-other cylinders above described.

What I claim isl. The coinhi-nation, with a plionogram-cy indcr, of a false shell for receiving the phonograin-hlank, substan ially as set forth.

2. The combination, with a tapering phoiiograincylinder, of a'false shell, having a tapering bore for receiving a phonograni-hlank, snl'lsiantially as set forih.

- 3. The combination, with a phonograni-eylimler, of. a false shell having aitapering bore, and a less tapering outer surface for receiving the pho-nop ram blank, substantially a set forth. 7

-l. lhe conihinailon, with a tapering phonograin-cyliinler, of a false shell having a i-a} pering hore. and a less tapering outer surface, and a phonograin-l'ilank having a slightly iw poring hore, snhsiantially as set forth.

This specification signed and witnessed this 29th day of September, 1888.

1110s. A. noises.

\Yitnesses:

WILLIAM PELZER,

E. C. ROWLAND. 

